Non-invasive power adjustable intraocular lens

Abstract

An improved multifocal design for an ocular implant is provided. This ocular implant includes an intraocular lens (IOL) and a number of haptics. The IOL passes optical energy. A microstructure within the IOL places the IOL under tension. The microstructure is operable to be broken in a controlled manner to release tension in the IOL and reshape the IOL. This may be done at any time post operatively and in conjunction with wavefront aberrometry to provide improved results. The haptics mechanically couple to the IOL in order to position and secure the IOL within the eye.

1. An ocular implant, comprising:
 an intraocular lens (IOL) operable to pass optical energy, the IOL comprising a controlled microstructure, the microstructure operable to place the IOL under tension, wherein the microstructure is operable to adjust tension in a controlled manner in response to an external stimulus, the microstructure comprising:
 a first ring; 
 a second ring, substantially concentric with the first ring; 
 a plurality of members operable to link the first ring and the second ring; the members operable to change length in response to an external stimulus to adjust the tension within the IOL, each of the members comprising a pocket of heat-absorbing material that shrinks when exposed to heat to change the length of the respective member; 
 
 a plurality of haptics coupled to the IOL operable to position the IOL within an eye. 
 
     
     
       2. The ocular implant of  claim 1 , wherein the IOL is operable to replace a natural lens of the eye. 
     
     
       3. The ocular implant of  claim 1 , wherein the IOL comprises:
 a diffractive region; and 
 a refractive region. 
 
     
     
       4. The ocular implant of  claim 3 , wherein:
 the diffractive region is operable to pass optical energy simultaneously to both near and distant focal points in photopic conditions; and 
 the refractive region is operable to pass optical energy to distance vision in mesopic conditions. 
 
     
     
       5. The ocular implant of  claim 1 , wherein the IOL comprises a biconvex optic. 
     
     
       6. The ocular implant of  claim 1 , wherein the microstructure is operable to controllably adjust tension to produce a change in a power of the IOL. 
     
     
       7. The ocular implant of  claim 1 , wherein the microstructure is operable to controllably adjust tension to produce a change in cylinder correction for the IOL. 
     
     
       8. An ocular implant, comprising:
 a multifocal intraocular lens (IOL) operable to pass optical energy in both photopic and mesopic conditions, the IOL comprises: 
 a controlled microstructure, the microstructure operable to place the IOL under tension, wherein the microstructure is operable to adjust tension in a controlled manner in response to an external stimulus, the microstructure comprising:
 a first ring; 
 a second ring, substantially concentric with the first ring; 
 a plurality of members operable to link the first ring and the second ring; the members operable to change length in response to an external stimulus to adjust the tension within the IOL, each of the members comprising a pocket of heat-absorbing material that shrinks when exposed to heat to change the length of the respective member; 
 a central diffractive region; and 
 an outer refractive region; 
 
 a plurality of haptics coupled to the IOL operable to position the IOL within an eye. 
 
     
     
       9. The ocular implant of  claim 8 , wherein the IOL is operable to replace a natural lens of the eye. 
     
     
       10. The ocular implant of  claim 8 , wherein:
 the diffractive region is operable to pass optical energy simultaneously to both near and distant focal points in photopic conditions; and 
 the refractive region is operable to pass optical energy to distance vision in mesopic conditions. 
 
     
     
       11. The ocular implant of  claim 8 , wherein the IOL comprises a biconvex optic. 
     
     
       12. The ocular implant of  claim 8 , wherein the microstructure is operable to controllably adjust tension to produce a change in a power of the IOL. 
     
     
       13. The ocular implant of  claim 8 , wherein the microstructure is operable to controllably adjust tension to produce a change in cylinder correction for the IOL.